Cup for pumps, &amp;c.



D. J. STOLTZ.

CUP FOR PUMPS, 6L0. APPLICATION FILED MAR. 23. ms.

1,297,033. Patented Mar. 11,1919.

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illlll-m-llllllllllll A WITNE'S8EI'S: I g INVENTOI? I ATTORNEY DANIEL J.STOLTZ, OF MONTPELIER, INDIANA.

our non PUMPS, 8w.

Specification of Letters Patent.

Patented Mar. 11, 1919.

Application filed March 23, 1918. Serial No. 224,160.

To all whom it may concern:

Be it known that I, DANIEL J. S'roLrz, a citizen of the United States ofAmerica, and resident of Montpelier, in the county of Blackford andState of Indiana, have invented certain new and useful Improvements inCups for Pumps, &c., of which the following is a specification.

This invention relates to improvements in cups for pumps and the methodof making same, and the object thereof is to so construct cups, of theform ordinarily used in pmnp-plungers, etc., that replacements of samewhich generally are made necessary because of wear, will be requiredless frequently. And, another object is to so construct the cup that itwill retain its original form and size until required for use.

The objects of the invention are accomplished by the constructionillustrated in the accompanying drawings, in which Figure 1 is avertical central section of a cup made in accordance with the invention;

Fig. 2 is a plan view of the same;

Fig. 3 is a plan view of a leather disk which forms apart of the blankof which the cup is formed;

Fig. 4 is a vertical central section of Fig. 3;

Fig. 5 is a side elevation of the leather disk, and showing also astratum thereon of boiled shellac;

Fig. 6 is a side elevation of a completed blank of which the cup isformed; and

Fig. 7 is a plan view of Fig. 6.

Similar characters of reference indicate corresponding parts throughoutthe various views and referring now to the same The cup is made of ablank formed of a leather disk A having numerous punctures B made in oneside thereof and which extend only partially through the body of thedisk. A heavy coating C of thick boiled shellac is applied to the diskso as to cover the entire surface of its punctured side, and upon thecoating of shellac is fixed a sheet D of heavy'canvas, shaped to conformwith the circular disk. The parts thus arranged are secured together byan annular series of stitches E extending near the marginal edge of theblank. When thus formed the blank Copies of this patent may be obtainedfor five cents each, by addressing the is treated to abath of heatedwater until it becomes flaccid, after which the blank is pressed intothe form of a cup by the use of dies, in the ordinary manner. While heldin the dies, in the shape to which it has been formed therein, the blankis subjected to baking treatment which consists of applying dry heat toan extent that its contained moisture is removed thereby. The blank thusshaped and treated is removed from the dies in a dry condition and issubsequently trimmed to the desired form, such for example as isshown inFigs. 1 and 2.

The eifect of the heated water renders the blank flaccid, andthefluidity of the shellac coating becomes greater so that it yieldsreadily to the process of its formation into the shape of a cup. Theapplication of dry heat in the baking process after the cup has beenshaped drives moisture therefrom and leaves the shaped cup permanentlyfixed as to its form. A blank thus formed is trimmed by the ordinarymachining process which is applied to give to the shaped blank itsultimate finished form which it retains permanently.

During the process in which the blank is saturated in heated water andshaped into a cup, owing to the punctures in the disk, the shellacpermeates the body of the disk, and when dry heat is applied the blankthus shaped becomes set and hardened, and

therefore does not tend to reassume its original form.

What I claim is:- A cup packing for pumps composed of a leather diskhaving numerous punctures in one of its surfaces, a coating of thickenedboiled shellac extending over the punctured surface of the disk, and acanvas sheet attached to the disk, with the shellac coating lyingtherebetween, the blank thus formed of the disk coating, and sheet beingshaped into the form of a cup and trimmed to the desired size.

In testimony whereof I affix my signature, in presence of two witnesses.

DANIEL J. STOLTZ. Witnesses:

DANIEL ARNOLD, T. C. PETERSON.

Commissioner of Patents,

Washington, D. 0.

